Transmission mount



Sept. 6, 1938. H. D. GEYER 2,129,124

TRANSMISSION MOUNT Filed Sept. 14, 1955 Harvey D Sayer 5 ATTORNEY i 3 INVENTOR Patented Sept. 6, 1938 UNlTED STATES PATENT. or ies Application September 14, 1933, Serial No. 689,358

4 Claims.

This invention relates to the resilient support of an automobile power plant unit upon the chassis frame.

An object of the invention is to provide a dou- B ble mount support wherein one mount thereof will resiliently support the vertical loads between one end of the power plant unit and the chassis frame and the other mount located adjacent thereto will take a large percentage of or substantially all the end thrust loads between the power plant unit and the chassis frame.

A more specific object is to provide such a double mount for supporting a transmission housing which is rigidly fixed to the rear end of the power plant unit.

A further object is to provide such a double mount having both of its mounts centered substantially on the central vertical longitudinal plane of the power plant unit, whereby harmful vibration effects of the power plant unit upon the chassis frame are lessened.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred embodiment of one form of the present invention is clearly shown.

In the drawing:

Fig. l. is a rear end View showing the rear end 3 .of an automobile. transmission housing mounted upon the cross member of the chassis frame by a double mount according to this invention.

Fig. 2 is a vertical section on line 2--2 of Fig. 1.

Fig. 3 is a plan view of the detached unitary double mount shown in Figs. 1 and 2.

Fig. 4 is a front elevation of the detached unitary double mount looking in the direction of arrow 4 of Fig. 3, but shows the rubber elements bulged out at the unconfined edges thereof as it does when supporting the engine weight.

Similar reference characters refer to similar parts throughout the several views.

Numeral Ill designates the rigid stationary transmission housing which is rigidly fixed to the rear end of and in effect forms an integral part of the automobile power plant unit (not shown), as is customary in present day automobiles. H is a heavy cross frame member of the chassis frame and curves down below and adjacent to the transmission housing IE! to serve as a suitable support therefor. A unitary double mount [2 connects the under side of the transmission housing ill to the cross member II. This double mount l2 comprises a substantially horizontally disposed resilient mount l3 for taking vertical loads and a substantially vertically disposed end thrust mount H1 for transmitting longitudinal end thrust loads between the chassis frame and the power plant unit, both mounts l3 and it being preferably centered on the central vertical longitudinal plane of the power plant unit as indicated in Fig. l.

This double mount l2 comprises an inner angular metallic plate l5, formed as illustrated, and two outer angular metallic plates l6 and if on opposite sides thereof and held spaced therefrom by the two resilient rubber blocks l8 on the horizontal legs thereof, with the two friction blocks i9 interposed between the vertical legs thereof. The two resilient rubber blocks 58 are preferably vulcanized in situ upon the plate It prior to assembling the other metal part thereto. The two friction blocks it each comprise a non-metallic composition friction lining it (which may be automobile brake lining or similar material), each friction' lini'ng fiilbeing preferably backed by a resilient'rubber cushion 26 (see Fig.2). These two friction blocks l9 are held suitably compressed between the central plate i5 and the two outer plates iii and H by the length'of the spacer tube 22 and the rivet 23 inserted through a central hole provided in all the necessary parts as clearly shown in Fig. 2. The hole 24 provided in the central plate i5 is sufficiently large to permit said plate G5 to clear the spacer tube 22 sufficiently to permit considerable relative vertical or lateral movement between the central plate It and the two outer plates l6 and H, which relative movement is resisted by the friction of the friction blocks l9 rubbing over the vertically disposed surface of plate l5.

Two laterally spaced spacer tubes 32 are provided through suitable holes in the horizontal legs of plates l6 and H for receiving the two bolts 33 which clamp the unitary double mount M to the bottom of the transmission housing as. Bolts 33 are drawn home against the ends of tubes 32, which tubes 32 are of such length as to permit the two resilient rubber blocks ill to be initially compressed the.desired amount when the two bolts 33 are vdrawn up tight. The two holes 34 in the central plate l5 give the desired suitable clearance between plate l5 and tube 32 and so prevent metallic contact between any metal parts attached to the housing Ill and any metal parts attached to the cross member H. The central plate It is rigidly fixed to the cross member II by the two bolts 40 extending through the projecting ears 4| on plate l5, and also preferably by the lower central bolt 42 and spacer tube 43 in an obvious manner, It is thus seen that the central plate !5 is very rigidly fixed to the cross member H while the two outer plates [6 and H are fixed to the transmission housing It] and that there is only a yielding non-metallic connection between the two.

In operation, the horizontally disposed mount 53 (comprising the two resilient rubber blocks l8 and associated metal parts) will obviously take substantially all the vertical loads, either up or down, at the rear end of the power plant unit of which housing in is in effect an integral part. Also the vertically disposed mount l4 (comprising the two friction blocks l9 and associated metal parts) will obviously take substantially all longitudinal end thrust between the power plant unit and the chassis frame since the mount l3 will yield quite easily a limited amount in such endwise direction. When any vertical loads cause a vertical yielding of mount l3 such vertical movement is frictionally resisted and hence damped by the mount 14, caused by the friction blocks I9 sliding upon the surfaces of plate !5. Also any relative pivoting movement or vibration of the power plant unit as a whole about any longitudinal axis thereof is likewise frictionally resisted and hence clamped by the friction blocks l9 sliding upon the surfaces of the relatively stationary plate 55.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. In an automobile, in combination, a power plant unit, a chassis frame having a cross frame member, a resilient support supporting the weight of one longitudinal end of said power plant unit upon said cross member, said support comprising: a mount resiliently supporting the vertical load of the power plant upon said cross member and being relatively more yieldable in a horizontal than vertical direction, and a second adjacent mount independently transmitting lon gitudinal thrust loads between said cross member and said power plant, said second mount being relatively more yieldable in a vertical than longitudinal direction and having relatively slidable friction means which damps the vertical movement between said power plant and cross member by sliding friction.

2. In an automobile, in combination, a power plant unit, a chassis frame having a cross frame member, a resilient support for one end of said power plant unit upon said cross member, said support comprising: a resilient mount permitting a relatively greater horizontal than vertical movement and so arranged as to take substantially all the vertical loads between one end of said power plant and cross member, and a second mount adjacent thereto and so arranged as to transmit substantially all the longitudinal thrust loads between said power plant and cross member, said second mount having relatively slidable friction means for resisting by sliding friction the vertical movement permitted by said first mount.

3. In an automobile, in combination, a power plant unit having a transmission housing rigidly fixed thereto at its rear end, a chassis frame having a cross frame member located adjacent said transmission housing, a resilient support connecting said transmission housing to said cross member, said support comprising: a mount resiliently supporting the major vertical loads between said housing and cross member, and a second adjacent mount independently transmitting the major longitudinal thrust loads between said housing and cross member and permitting relatively easy movement in a transverse plane, said second mount having relatively slidable friction means for frictionally resisting vertical movement permitted by said first mount.

4. In an automobile, in combination, a power plant unit, a chassis frame for supporting said power plant unit and having a cross frame member, a resilient support located substantially in an axial vertical plane at one longitudinal end of said power unit and fixed to said cross frame member, said resilient support comprising twoelements the first of which independently carries substantially all the vertical loads at that end of said power unit, and the second of which independently carries substantially all the axial thrust loads between said power unit and chassis frame, said second element having vertically sliding friction means which. damps any vertical movement permitted by said first element.

HARVEY D. GEYER. 

